雪峰古陆边缘上石炭统陆源碎屑和碳酸盐混合沉积  

THE UPPER CARBONIFEROUS MIXED SILICICLASTIC AND CARBONATE SEDIMENTS ON THE MARGIN OF THE XUEFENG ANCIENT LAND

作　　者：张雄华[1] 

机构地区：[1]中国地质大学,湖北武汉430074

出　　处：《地层学杂志》2003年第1期54-56,58,共4页Journal of Stratigraphy

基　　金：国家区调项目湖南<马底驿;四都坪幅>1/5万区调成果之一。

摘　　要：湖南沅陵雪峰古陆边缘上石炭统主要包括下列岩相类型 :冲积扇砂砾岩相、前滨海滩砂岩相、浅滩碳酸盐相及混积岩相、潮下碳酸盐岩相及滩后局限碳酸盐岩相。通过沉积相分析和古岩溶面的确定 ,在该区上石炭统中共划分出 13个海侵海退旋回及 5个三级层序。对上石炭统中发育的混积岩也进行了讨论。The main sedimentary facies of the Upper Carboniferous on the margin of the Xuefeng Anicient Land can be divided into submarine alluvial, foreshore siliciclastic, shallow beach carbonate, carbonate platform and backshore restrict carbonate facies. Based on the studying sedimentary facies and palaeokarst surface, 13 transgression-regression cycles and 5 third order sequences are distinguished.Besides, the oringin of the mixed sedimentitation of the Upper Carboniferous is discussed.

关 键 词：湖南 上石炭统 陆源碎屑岩 碳酸盐相 混积岩相 混积岩 混合沉积 沉积环境 

分 类 号：P588.2[天文地球—岩石学]